6 Choosing a PxPos / ITI sensor as a position reference sensor for GLL sentences
The PxPos and ITI sensors can use GLL sentences to communicate their position. By default, the position reference system in a GLL sentence is a Height sensor. However, you can choose another PxPos / ITI sensors as the position reference sensor.
Prerequisites
You must previously install the latest version of the TV80 software.
Context
The phrase position reference sensor identifies the sensor that is used for generating the sentence $IIGLL,ddmm.hhh,N,dddmm.hhh,W,hhmmss.ss,A*hh<cr><lf> The system can only recognise one position reference sensor. Make sure that the rest of the sensors are not set as position reference systems.
Procedure
1 Open the Windows File Explorer on your computer.
2 Access C:\ProgramData\Simrad\TV80\config.
3 Open the ITI_out.xml file using a text editor compatible with XML files.You do not need administrative rights to edit this file. If you cannot modify this file, contact Kongsberg Discovery support.
4 Observe the sentence name <var name="PSIMH1" send="y" sensor_reference="y" />. It identifies the Height sensor, which is set as a position reference system.
5 Change the line to <var name="PSIMH1" send="y" sensor_reference="n" />.
The letter "y" means "Yes", while the letter "n" means "No".
6 Locate the sensor you want to set as the position reference sensor.
Each sentence represents a sensor:
•  PSIMH1: Height 1
•  PSIMH2: Height 2
•  PSIMS1: Spread 1
•  PSIMS2: Spread 2
•  PSIMDE: Depth
•  PSIMTM: Temperature
7 Change sensor_reference="n" to sensor_reference="y" on the relevant sensor sentence.
The system can only recognise one position reference sensor. Only one sensor should be sensor_reference="y". The rest of the PxPos sensors should be sensor_reference="n". If more than one sensor is sensor_reference="y" the system TV80 will take the last one as a reference sensor. If there is no sensor set to sensor_reference="y", no IIGLL sentence will be transmitted.
8 Save the changes and close the file.
Result
The selected sensor is set as the position reference sensor.